linux-kernel - Re: [PATCH] x86/mm: Assign the initail value to the pmd

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Message-ID: <CAE9FiQW2kMDbO-OFB_qzum7KFP=uO6HtBk-54-PgiB4zWhSfZQ@mail.gmail.com>
Date:	Mon, 20 Jul 2015 11:28:53 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Minfei Huang <mhuang@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Wang Nan <wangnan0@...wei.com>,
	David Vrabel <david.vrabel@...rix.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Minfei Huang <mnfhuang@...il.com>
Subject: Re: [PATCH] x86/mm: Assign the initail value to the pmd_idx

On Sun, Jul 12, 2015 at 5:18 AM, Minfei Huang <mhuang@...hat.com> wrote:
> From: Minfei Huang <mnfhuang@...il.com>
>
> The variable pmd_idx is undefined, when we try to start the loop to
> calculate the page.
>
> Assign the proper value which indexes the start address to make it work
> well.
>
> Signed-off-by: Minfei Huang <mnfhuang@...il.com>
> ---
>  arch/x86/mm/init_32.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
> index 8340e45..68aec42 100644
> --- a/arch/x86/mm/init_32.c
> +++ b/arch/x86/mm/init_32.c
> @@ -137,6 +137,7 @@ page_table_range_init_count(unsigned long start, unsigned long end)
>
>         vaddr = start;
>         pgd_idx = pgd_index(vaddr);
> +       pmd_idx = pmd_index(vaddr);
>
>         for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd_idx++) {
>                 for (; (pmd_idx < PTRS_PER_PMD) && (vaddr != end);

Reviewed-by: Yinghai Lu <yinghai@...nel.org>
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